MemoryRegionInfo describes the region of memory in a process, but this
does not have to be the liblldb's notion of a process (in fact, this
class is already used in lldb-server, which has a different hierarchy of
process-related classes).
So a better place for it would be in the Utility module (next to
RegisterValue, State and similar). We might also consider creating a new
module for classes like this, because we currently have a number of
classes which can be described as "properties of a process" in the
Utility module.